Photo of the Hue Citadel
Hue, Vietnam, Southeast Asia

Imperial City, Hue
Excerpt from Wikipedia, the free encyclopedia

The Imperial City in Hue is a walled fortress and palace in the former capital of Vietnam. It was intended to be a copy of the Chinese Emperor's Forbidden City in Beijing, China.

Characteristics
The grounds were surrounded by a wall 2 kilometers by 2 kilometers, and the walls were surrounded by a moat. The water from the moat was taken from the Huong River (Perfume River) that flows through Hue. This structure is called the citadel.

Inside the citadel was the Imperial City, with a perimeter of almost 2.5 kilometers.

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Ref: Hue Citadel #4